· · · ·

Achernar

Alpha Eridani

Proper NameAchernar
Bayer DesignationAlpha Eridani
Flamsteed NumberNone
HR (BSC)472
HD10144
ConstellationEridanus
Right Ascension1h 37m 43s
Declination-57° 14' 12"
Distance139 light years
43 parsecs
MagnitudeApparent: +0.5
Absolute: -2.8
Spectral ClassB3V Blue Dwarf
Optimum VisibilityOctober / November (Usually visible from southern latitudes)
NotesAn eclipsing binary of the Beta Lyrae type, with a white companion star

A blue dwarf star with an unusual spectrum, Achernar has a magnitude of +0.5, making it the brightest of the stars of Eridanus, and the ninth brightest in the entire sky.

Location of Achernar

Bright Achernar lies at the extreme southern tip of the star-river Eridanus, less than a degree from its southernmost border with neighbouring Hydrus.

Achernar

The River's End: brilliant blue Achernar, the ninth brightest star in the sky, lies at the southern tip of the star-river Eridanus.

HR Diagram
π Cephei
41 Draconis
50 Leonis Minoris
Polis
Pincoya
Nashira
75 Cygni
a Velorum
Miram
ο1 Cygni
Petra
TZ Arietis
θ Hydrae
x Carinae
w Carinae
Xi Boötis B
Sharjah
s Velorum A
Struve 2398 B
Gakyid
Berehynia
Felixvarela
FL Virginis
AU Microscopii
HD 37131
Nosaxa
AX Microscopii
b Velorum
Gliese 440
GX Andromedae
Gliese 687
Guniibuu
δ Muscae
Cerberus
CS Camelopardalis
ε Indi
Erakis
Diya
Dombay
e Aquilae
Ebla
Kapteyn's Star
Koeia
KR Muscae
k Hydrae
Chaophraya
Mekbuda
Kruger 60 A
DO Cephei
La Superba
Inquill
IL Aquarii
δ Caeli
Almaaz
α Centauri A
χ Cygni
Sadr
ζ Arae
Rigel
Ross 154
θ Circini
ι1 Scorpii
Arneb
Adhafera
HO Librae
Antares
Mirfak
Thabit
Hind's Crimson Star
61 Cygni B
Achird
Capella
Mira
Mebsuta
61 Cygni A
ρ Cygni
d Lupi
Teegarden's Star
Rastaban
Acubens
Alnilam
Ran
Alfirk
Sargas
Polaris
ν2 Canis Majoris
van Maanen's Star
Proxima Centauri
Sirius B
ε Reticuli
U Sagittarii
π5 Orionis
EE Leonis
Atria
Suhail
BF Orionis
Unurgunite
Betelgeuse
UV Ceti
Enif
γ Pavonis
Tureis
Alchiba
σ Orionis
η Carinae
Canopus
Schedar
Avior
Hatysa
ο Capricorni B
52 Orionis
Naos
Deneb
Azmidi
β Pictoris
WX Ursae Majoris
τ Ceti
Wolf 498
Wolf 359
Wezen
15 Orionis
Gliese 536
Achernar

Hertzprung-Russell diagram plotting the temperature and luminosity of Achernar (marked by the red circle) relative to other stars.

Indexes

Related Entries